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Jackson, Chandra L.; Ward, Julia B; .; Johnson, Dayna A.; Sims, Mario; Wilson, James; & Redline, Susan S. (2020). Concordance between Self-Reported and Actigraphy-Assessed Sleep Duration among African-American Adults: Findings from the Jackson Heart Sleep Study. Sleep, 43(3), zsz246. PMCID: PMC7066489


STUDY OBJECTIVES: Most epidemiological studies assess sleep duration using questionnaires. Interpreting this information requires understanding the extent to which self-reported habitual sleep reflects objectively-assessed sleep duration, particularly among African Americans, who are at risk for sleep health disparities.
METHODS: Among African-American participants of the Jackson Heart Sleep Study, we investigated differences in questionnaire-based self-assessed average sleep duration and self-assessed wake-bed time differences compared to actigraphy-based assessments of total sleep time and average time in bed. Linear regression models provided estimates of concordance between actigraphy-based and self-reported sleep duration.
RESULTS: Among 821 adults, self-assessed average sleep duration was lower than self-assessed wake-bed time differences (6.4 +/- 1.4 vs. 7.5 +/- 1.7 hours, p<0.0001). Mean actigraphy-based total sleep time was 6.6 +/- 1.2 hours, and actigraphy-based average time in bed was 7.6 +/- 1.2 hours. Self-assessed average sleep duration and actigraphy-based total sleep time were modestly correlated (r=0.28, p<0.0001). Self-assessed average sleep duration underestimated actigraphy-based total sleep time by -30.7 (95% confidence intervals (CI): -36.5 - -24.9) minutes. In contrast, self-assessed wake-bed time differences overestimated actigraphy-based total sleep time by 45.1 (95% CI: 38.6-51.5) minutes. In subgroup analyses, self-assessed average sleep duration underestimated actigraphy-based measures most strongly in those with insomnia symptoms.
CONCLUSION: Among African Americans, self-assessed average sleep duration underestimated objectively-measured sleep while self-assessed wake-bed time differences overestimated objectively-measured sleep. Sleep measurement property differences should be considered when investigating disparities in sleep and evaluating their associations with health outcomes.


Reference Type

Journal Article

Year Published


Journal Title



Jackson, Chandra L.
Ward, Julia B
Johnson, Dayna A.
Sims, Mario
Wilson, James
Redline, Susan S.

Article Type




Data Set/Study

Jackson Heart Sleep Study


United States of America